1) In .aspx side in the declaration of TextBox use the property ReadOnly=“true” and the user wont be able to alter the text box text unless specified from the code behind .cs side.

2)in .cs side where in we can write txtUserName.ReadOnly = true; we can write it in page load or in button click event or to show default text in text box can supply the text from code behind like this txtUserName.Text = “Dilip”; where txtUserName is the ID of the TextBox.

Note: Here the beauty is that i have login and singnup button and i made defaultbutton as login button, and defaultfocus on username text box so whenever this page is viewed from any web browser focus will be on username text box and default button will be login button so when u hit enter it will invoke login button so simple.

Step 2: see carefully i have a function onclick=”btnLogin_Click” now press F7 key and go to .cs side of the same page or right click on the mouse and select view code .

and write the following code in .cs side

protected void btnLogin_Click(object sender, EventArgs e)

{

Response.Write(“Default Button was clicked and u are now logged In”);

Response.End();

}

Note: Here another concept when ever you enter key this method will be invoked and at the same time there wont be any other you can see that means response is closed just to make you feel that you really logged in but actually u are in same page.

In Dot Net there will be many cases where in we need to operate on strings and first thing we remember is using system.String but there are certainly many points we need to remember and consider before we operate on strings.

1) Performance.

2)how many times we need to concatenate.

Lets take an example for concatenate five strings.

EX 1. Using System.String

System.String str =“My Name is dilip”;

str += “and i am”; str += “working on “;

str += “Post of “;

str += “difference between string and string builder”;

Response.Write(str);

and the expected output well you probably guessed it right

“My Name is dilipand i amworking on Post of difference between string and string builder”

Now what has happed? yes the important question now how many times we have appended the str variable those number of times string was created in memory location and abandoned when a new string is created and later waiting for garbage collection.

This leads to memory wastage and degradation of performance because string are immutable(that means any change to string causes a runtime to create a new string and abandon old one).

Think about the situation where in u need to work on 100 or more strings????

Dot Net has answer for it in the form of System.Text.StringBuilder class

EX2. Same Example using StringBuilder

StringBuilder sb = new StringBuilder();

sb.Append( “My Name is dilip”);

sb.Append( “and i am”);

sb.Append( “working on “);

sb.Append( “Post of “);

sb.Append( “difference between string and string builder”);

and the output is same as previous

“My Name is dilipand i amworking on Post of difference between string and string builder”

But this time there was only one string created in memory dynamically and modified as we append the new string, by this there is not much garbage collection and also helps improve performance.Append is taken only for example there are a lot of other functions which are just waiting for you to invoke.Happy coding.

The HyperText Transport Protocol (Secure), the standard encrypted communication mechanism on the World Wide Web and this is actually just HTTP over SSL.

Advantages of HTTPS

Same as HTTP, only encrypted for security purposes.HTTPS (Hypertext Transfer Protocol over Secure Socket Layer, or HTTP over SSL) is a Web protocol built into its browser that encrypts and decrypts user page requests as well as the pages that are returned by the Web server and developed by Netscape. HTTPS is really just the use of the Netscape’s Secure Socket Layer (SSL) as a sublayer under its regular HTTP application layering.

The Hypertext Transport Protocol, Secure, the standard SSL communication mechanism of World Wide Web.(1) (HyperText Transport Protocol Secure) The protocol for accessing a secure Web server and using HTTPS in the URL instead of HTTP directs the message to a secure port address rather than the default Web port address of 80. The session is then managed by the security protocol.

(2) (HyperText Transport Protocol Secure) The protocol for accessing a secure Web server and using HTTPS in the URL instead of HTTP directs the message to a secure port number rather than the default Web port number of 80. The session is then managed by a security protocol.

(3) (HyperText Transport Protocol Server) A Web server that runs under Windows NT, developed by the European Microsoft Windows Academic Centre.

HTTP layered over the SSL protocol.

Secure Hypertext Transfer Protocol.

Secure HyperText Transfer Protocol

Same as HTTP but provides secure Internet communication using SSL.
A type of server software which provides the ability for “secure” transactions to take place on the World Wide Web. If a Web site is running off a HTTPS server you can type in HTTPS instead of HTTP in the URL section of your browser to enter into the “secured mode”. Windows NT HTTPS and Netscape Commerce server software support this protocol. SEE ALSO: proxy server, secure server and commerce server.

https is ordinary http exchanged over an SSL-encrypted session.A new implementation of the HTTP protocol that provides for more secure web communications by including encryption methods.

A variant of HTTP that encrypts messages for security.(HyperText Transfer Protocol Secure) A secure protocol for sending information forth and back over the Internet and the HTTPS protocol most frequently relies on the SSL (Secure Socket Layer) encryption system but others such as TLS (Transport layer security) are also available. Every attempt has been made to provide you with the correct acronym for HTTPS and if we missed the mark, we would greatly appreciate your help by entering the correct or alternate meaning in the box below. Definitions have been compiled multiple results provided for your review and popular search engine.

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